Improvement in drills for artesian w



No. 49,798. PATENTED SEPT. 5. 1865.

' J. SHAW.

DRILL FOR ARTESIAN WELLS.

l/III UNITED STATES PATENT OFFIeE.

IMPROVEMENT IN DRILLS FORART-ESIAN'WELLSH Specification forming part of LettersPatentNo,49398dated September 5, 1865. v

To all whom it may concern:

Be it known that I, JEHYLEMAN SHAW, of"

Bridgeport, in the county of Fairfield and State of Connecticut, have invented a. new and useful Improvement in Drills for Artesian Wells; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enablethose skilled in the art to make and use the same, reference being had to the accompanying drawings; forming part of this specification, in "which- Figure 1 is an axial section of a. drill made according to mv invention. Fig. 2 is aplen view.

Similar letters of reference indicate like p The object of this invention isto bore' and cut th rough thebotvlders which are often found in the path of the soil-pipe when the latter is being driven down to the surface of the rock; and it consistsfin an expanding drill, which is operatedwithin thesoil-pipe. When it is drawn upward the cutters fall together, and become contracted to a compass less. than the diameter of the pipe; but when it is forced downward. and strikes a stone or any other hard object below the end of the pipe its cutters are forced outward in radial directions to adlameter great- It works through elongated holes cut in the shanks of the cutters, so tbat'wh n they are pushed upward, or rather when the socket moves down over-thennthe bottom. Cot-the socket willfstrike against the n'pper-endsof the cutters, and'so preserve thein from strikin g on the bolt. Thefaces of, the cutters are at auob tuse angle with the direction of their length,

strnction enables the cutterstoexpand when they strike any object on their descent, their faces being compelled by the weightofthetool" tomove outward,'their points st'riking and moving outward, so. as toenlerge, the diameter oi,

the out they aren aking, h nd making what mny beealled a drawing cut 'on the ohject'they strikeagainst Whenthetoolisdrawu upward within the soil-pipe .its eutt'ers'fall into'the some straight line, and they nrethen of less diame ter than its internal diameter. x The tool is oper'ate'd within thesoil-pipe, audits stock and socket are'of' such dimensions as to workeasily within the seine. -Whenin driving the pipeit s end comes upon? 'bowlder which will not yieldv befo'reit thisdrill is applied, and iti sie t'ide'nt that s'inc'eits cutterson'ly expand when-they strike the object below the-end of tlie-soil pipethey will gradually boreztpath for the pipe-and let it sink down through such bore as i'ast'as the detritus is removed by the said pump.

I elaim as new h nd desire to secure byliet ters Patel] t- A drill for boring n pathfor the soil-pipethrough'bowlders andotherhardobjects which obstruct the descent of sue-h pipe, constructed and operated substantially asabove shown.-

JEHYLEMAR SH AW.

Witnesses I M. M. Lrvrnes'ron,

G. L. ToPLmF. 

